Grinding or crushing mill



2 Sfiegts-Sheet I.

. P. A; 000K.

GRINDING on. GRUSHING' MILL. No. 568,334. Patented Sept- 1896' WITNESSES: INVENTOH A Ira/m5 Yb.

(No Model.) 2 Shets-Sheet 2.

'P. A. 000K. GRINDING 0R GRUSHING MILL.

No 568,334.- Patented Sept. 29, 1896.

NITED STATES PHILIP A. COOK, OF WOODSIDE, NEW JERSEY, ASSIGNOR OF ONE-HALF TO J. FRANK EMMONS, OF STATEN ISLAND, NEIV YORK.

GRINDING OR CRUSHING MILL.

SPECIFICATION forming part of Letters Patent No. 568,334, dated September 29, 1896, Application filed November 14, 1894. Serial No. 528,718. (rt model.)

To all w/tom it may concern;

Be it known that I, PHILIP A. COOK, a subj eet of the Queen of Great Britain, and a resident of IVoodside, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Grinding or Crushing Mills, of which the following is a specification.

My invention relates to grinding or crushing mills; and it consists of certain novel parts and combinations of parts, and also of certain novel methods, as pointed out in the claims concluding this specification.

In the accompanying drawings I have illustrated a mill involving, in forms at present preferred by me, the several novel features of my invention but it will be understood that my invention may be embodied in other forms, and that various modifications and changes may be made without departing from its spirit and without exceeding the scope of the concluding claims.

Referring to the drawings, Figure 1 is a side view of a centrifugal crushing-mill, partly in section. Fig. 2 is an end View of the same. Fig. 3 is a transverse section at line 00 m, Fig. 1. Fig. 4 is an end elevation of one of the fans I; and Figs. 5 and 6 are respectively front and side elevations of one of the fans A.

The following is a description of the mill illustrated in said drawings, which may be used either as a dry or wet mill.

The body of the mill is formed of a cylindrical portion 5 5.

(3 6 are the revolving heads of the cylinders.

7 7 are rollers, carried on journals 8 8, set in journal-boxes 9 9, seated in the revolving cylinder-heads 6 6. These journal-boxes, as shown in Fig. 2, are made rectangular in form and do not closely fit the recesses in the revolving head-plates 6 6. A certain amount of play to and from the ring 5.is provided say one and seven-eighths of an inch, or more, if required. The bearing for the shaft 8 in the journal-box 9 is drilled unsymmetrically out of the center, being a different distance from each of the four sides of the box, as shownin Fig. 2. The box 9, being removable, can be changed around and set in any desired position. In this way the distance between the crushing-rollers 7, carried on the shaft 8,

and the crushing-ring 10, against which said rollers bear, can be varied at will to grind the material to four different degrees of fineness or coarseness.

The cylinder-heads 6 are carried on and keyed to main shaft 11, which is caused to revolve by any suitable power applied thereto. The cylinder-heads 6 therefore revolve with the shaft 11 and carry with them the shafts 8 8 of the crushing-rollers 7.

To the stationary cylinder 5 is bolted a ring 5, provided with a chamber B, made to receive suitable packing material, which may or may not be used. Generally speaking, I prefer to use it when material is being ground very fine dry, and prefer not to use it when material is being ground wet. The centrifugal force generated by the rotation of the rollers 7 acts upon the material which'is between the crushing-ring 10 and said rollers with a force which increases or diminishes as the velocity of revolution increases or diminishes.

K is a hopper through which the material is fed to the mill. This hopper is provided with a feed device of ordinary, construction, the extent of vibration of which is controlled by a hand-screw J, which after adjustment is locked by the lock-nut L. The power to operate the hopper is transmitted from the main shaft by a belt 12 to a pulley 13, which is connected by shaft 14 to the feeding mechanism of the hopper.

The rollers 7, carried upon shafts 8, journaled in loose boxes 9, are capable of ap proaching and receding from the crushingring 10 a determined distance by reason of the play provided between the boxes and their seats in the head-plates. Th us all strain and back pressure is avoided and the use of springs or similar contrivances is rendered unnecessary. If desired, a yielding material, such as soft rubber, may be used between the journal-boxes and their seats on one side to prevent jar when the mill stops.

Attached to the shafts 8 are flutter-fans I. O C C are screens placed upon the periphery of the chamber opposite the flutter-fans I, against and through which the crushed material is thrown by said fans.

E is a baffle-plate to direct the material as fed to the mill upon the'fans H H 11, set at an angle, and by which said material is fed between the ring and crushing-rollers. I

The fans A are set at suitable intervals 011 the inside surface of the revolving plates 6, being secured thereto by bolts, as indicated, and operate near and in front of the inside of the screens C, so as to remove from said screens any material which lodges in contact with them, but which is too large to pass through and to prevent the clogging of said screens by slimes. These fans A are made in the form of a single piece, as shown in rear view in Fig. (3, so that when bolted to the revolvin g plate 6 they project inwardly. In Figs. 3 and 5 these plates are shown in front view, the arrows in each instance indicating the direction in which the plate 6 is revolving. Each plate on its front face is provided with a flange, as shown in full lines in detail in Fig. 5 and by the dotted lines in Fig. 6. The fans A throw the partially-ground material in the path of the fans II II, which catch it and put it again under the rolls.

In the foregoing specification I have incidentally referred to some of the modifications which might be adopted in the practice of my invention, but I have not endeavored to specify all the modifications which might be employed, the object of this specification being to instruct persons skilled in the art to practice my inventions in their present preferred forms, and to enable them to understand their nature, and I desire it to be distinctly understood that mention by me of a few modifications is in no Way intended to exclude others not referred to, but which are within thespirit and scope of my invention.

Many of the details and combinations illustrated and above described are not essential to the several inventions broadly considered. All this will be indicated in the concluding claims, where the omission of an element or the omission of reference to the detail features of the elements mentioned is intended to be a formal declaration of the fact that the omitted elements or features are not essential to the inventions therein severally covered.

As to the features of my invention which consist of novel methods of operation, it will be understood that they are not limited to the mechanism described, nor, indeed, to any particular mechanism.

hat I claim is 1. In a centrifugal crushing-mill, the combination with a cylinder, a screen set in the periphery of said cylinder, and the crushingrolls, of revolving head-plates and journalboxes carrying the shaft of said :rolls set in said head-plates.

2. In a centrifugal crushing-mill, the combination with a cylinder and crushing-roll, of revolving head-plates and journal-boxes carrying the shaft of said roll set in said headplates.

3. In a centrifugal crushing-mill, the combination with a cylinder of a crushing-roll carried by a shaft, journal-boxes carried by the head-plate in which said shaft rotates said boxes being in a radial direction smaller than the recesses in which they are placed so as to permit the roll to approach and recede from said cylinder.

4:. In a centrifugal crushing-mill, the combination with a cylindrical surface upon which the material is crushed, of a revolving crushing-roll carried by a shaft, means for supporting and revolving said shaft, a journal-box in which said shaft is supported havin g a limited radial motion to and from said cylinder, said shaft being located eccentrically within said box, so that by changing the position of the box the extent of its radial motion, acting under the impulse of centrifugal force, is limited.

5. In a centrifugal crushing-mill, the combination of a cylinder and crushing-roll of a baflie-plate extending down below the surface of the fan supplying the roll to direct the entering material between the crushing-roll and the cylinder.

PHILIP A. COOK.

\Vitnesses:

J. EDGAR BULL, M. WILsON. 

